jquery 分页控件功能

<script>      

 //分页
        function getPageNum(num) {
            $("#PageNum ul").empty();
            var AllCount = num;
            var total = Math.ceil(AllCount / 5); //数据可分的页数
            var allhtml = "共<strong style='margin: auto 3px;'>" + total + "</strong>页";
            $("#txtAll").html(allhtml);
//            $("#txtAll").val(total);
            for (var i = 1; i < total + 1; i++) {
                var html = "<li><a>" + i + "</a></li>";
                $("#PageNum ul").append(html);
            }
            var totalCount = Math.ceil(total / 7);
            var current = 1;
            $("#PageNum ul li:gt(6)").hide();
            $("#btnPrev").attr("disabled", "disabled").click(function () {
 
                $("#btnNext").removeAttr("disabled");
                current -= 1;
                $("#PageNum ul li").hide();
                var indexStart = (current - 1) * 7;
                var indexEnd = indexStart + 7;
                $(" #PageNum ul li").hide().slice(indexStart, indexEnd).show();
                if (current == 1) $(this).attr("disabled", "disabled");
            });
 
            $("#btnNext").click(function () {
                $("#btnPrev").removeAttr("disabled");
                current += 1;
                $("#PageNum ul li").hide();
                var indexStart = (current - 1) * 7;
                var indexEnd = current * 7 - 1 > $("#PageNum ul li").length - 1 ? $("#PageNum ul li").length - 1 : current * 7 - 1;
                $(" #PageNum ul li").hide().slice(indexStart, indexEnd+1).show();
                if (current == total) $(this).attr("disabled", "disabled");
            });
 
            $("#PageNum ul li").click(function () { //点击数字
                $("#PageNum ul li").removeClass();
                $(this).addClass("current");
                var index = $(this).index();
                getPageCurrent(index);
            })
            $("#btnConfirm").click(function () {//搜索页
                $("#PageNum ul li").removeClass();
                var index = $("#txtIndex").val();
                if (index % 7 == 0) {
                    var indexStart = (Math.ceil(index / 7) - 1) * 7;
                }
                else {
                    indexStart = index - (index % 7);
                }
                var indexEnd = indexStart + 7;
                $(" #PageNum ul li").hide().slice(indexStart, indexEnd).show();
                $(" #PageNum ul li").eq(index - 1).addClass("current");
                getPageCurrent(index - 1);
            })
        }
        function getPageCurrent(index) {
            var indexStart = index * 5;
            var indexEnd = indexStart + 5;
            $(" #thumbWrap_controlID ul li").hide().slice(indexStart, indexEnd).show();
        }

</script>


html代码：

<div class="products_contents" id="product">
                <div class="thumbWrap">
                    <h2 style="font-size: 30px; color: #f8b551; text-align: center; line-height: 56px;">
                    </h2>
                    <div class="thumbWrap_control" id="thumbWrap_controlID">
                        <ul style=" height:24px;">
                        </ul>
                    </div>
                    <div id="PageNum">
                     <span class="totalPage" id="txtAll"></span>
                    <input type="button" id="btnPrev" value="上一页" />
                        <ul>
                        </ul>
                        <input type="button" id="btnNext" value="下一页" />
                        到<input type="text" id="txtIndex"/>页<input type="button" id="btnConfirm" value="确定" />
                    </div>
                </div>
            </div>
样式：

<style type="text/css">

 #PageNum{ 680px; margin-top:20px; font-size:16px; color:#84868e; float:left; margin-left:25px;}
        #PageNum ul{list-style:none;text-align:center;}
        #PageNum ul li{ font-size:12px; margin-left:6px; margin-right:6px; float:left; border:1px solid #ccc; padding-left:8px; padding-right:8px; line-height:24px; font-size:16px; cursor:pointer;}
        .current{background:#fff; color:#020e2a;}
        #btnPrev,#btnNext,#txtAll{ float:left; margin:0px; margin-left:5px; margin-right:5px;}
        #btnPrev,#btnNext,#btnConfirm{ color:#555;line-height:24px; height:24px; padding-left:5px; padding-right:5px;}
        #txtAll{ 56px; height:24px; line-height:24px;color:#616D89;}
        #txtIndex{ 50px;height:24px; line-height:24px; margin:0px; background: #0c2643;}
        .totalPage{ float:left; display:block; line-height:24px; margin-right:40px;}
     </style>